Html::url() fix for anchors

framework/yii/helpers/base/Html.php

@@ -1364,7 +1364,7 @@ class Html
 			return Yii::$app->getRequest()->getUrl();
 		} else {
 			$url = Yii::getAlias($url);
-			if ($url[0] === '/' || strpos($url, '://')) {
+			if ($url[0] === '/' || $url[0] === '#' || strpos($url, '://')) {
 				return $url;
 			} else {
 				return Yii::$app->getRequest()->getBaseUrl() . '/' . $url;